Alarm Health - Technical Report
Analysis information
The site being analyzed here is : Devonport Royal Dockyard.
The analysis period started on 2016-04-01 to 2016-04-30.
Analysis insights : Overall system health
1 - Number of alarms - How many alarms ?
Monthly Total Number of alarms
The total number of alarms of this month is :
- 36991 alarms were detected.
This represents a decrease of -32459 number of alarms from the previous month’s total of 69450 number of alarms.
Monthly sub-categories of alarms
Out of this total number of alarms, we may further categorize alarms into :
36816 alarms, are classified as “Chattering/Fleeting”. This means that these alarms are coming from a chattering meter (a meter which frequently/constantly hits the system by sending alarms). Some of these may last a certain duration, and they may also recur on a regular basis (e.g., a regular 10 minute interval pattern). Others may have no self-evident pattern (e.g., may appear in a fleeting way, turning “on” and “off” very quickly, with no discernable regularity in terms of timespan between alarm occurences).
36991 alarms, are classified as “Flood periods”. This means that more than 10 alarms appeared, and several meters were sending alarms during this 10 minute period.
81 alarms, are classified as “Stale alarms”. This means that these alarms lasted longer than 24h.
2 - Alarms rates = Presence alarms per time intervals
A representative value is given by the ISA18.2 “Test <1% of 10 minute periods contain more than 10 alarms”
The percentage of 10 minutes periods which have more than 10 alarms of this month is :
- 100 % detected.
This represents no change from the previous month with a stable percentage of 100 from the previous month’s percentage of 100 10 minutes periods containing more than 10 alarms.
Here is a graph showing a daily nr of
Monthly Alarms Rates per 10 minutes interval
This provides a more detailed view
NUISANCE ALARMS removal : Why care & where to focus ?
Overall analysis :
This section will guide you in the recommended steps of nuisance alarms analysis and associated recommendations
Why should you start with removing the nuisance alarms ?
And what would be the overall alarms management improvement ?
Step 1 : Start with the STALE alarms
The key element here is the duration of the stale alarms
These stale alarms often are main contributors to the “constant baseline” of alarms.
What is important to understand is that the duration of the sale alarms is the key metric.
- If for example some “over-THD alarm” are triggered by 15 different meters, and if the over THD issue lasted for 20 days :
– The alarms system already has 20 days of constant presence of alarm floods.
– This is considered a “constant baseline” during these 20 days.
This type of events is visually very easy to detect on a graph, as this functions like a “step” when turned “on” and then later when it is turened “off”.
Here is a graph illustrating the impact of the stale alarms on this month’s presence of alarms in each 10 minute timestamp.
This represents a reduction of 65 % of the presence of alarms in all the 10 minutes timestamps.
How would the removal or aggregation of STALE alarms improve the number of present alamrs
So if we were able to remove the stale alarms, here is what the monthly number of alarms would look like for each 10 minutes timestamp.
Step 2 : Identify the CONSTANT CHATTERING alarms
These alarms are due to the constant re-occuring conditions and can be named “constant-chattering alarms”
These “constant-chattering alarms” often also main contributors to the “constant baseline” of alarms.
In this case, what is important to understand is that the 2 key combined metrics are :
The PRESENCE : This is the number of 10 minutes timestamps where the alarm is present
The FREQUENCY : This is the number of alarms, so the number of occurences per each of these 10 minutes timestamps.
If for example 5 meters pick up a “THD voltage alarm” condition which appears for a short duration on an average of 5 times in every one of the 10 minutes intervals during that month, the system again would end up with a constant average number of alarms of 25 alarms per 10 minutes time interval.
Here is a graph illustrating the impact of the constant alarms on this month’s presence of alarms in each 10 minute timestamp.
This represents a reduction of 65 % of the presence of alarms in all the 10 minutes timestamps. CHANGE VARIABLE TO CONSTANT CHATTERING
How would the removal or aggregation of CONSTANT CHATTERING alarms improve the number of present alamrs
So if we were able to remove the stale alarms, here is what the monthly number of alarms would look like for each 10 minutes timestamp.
Step 3 : Identify the FLEETING alarms which have a LOW PRIORITY
These alarms are due to the constant re-occuring conditions and can be named “constant-chattering alarms”
These “constant-chattering alarms” often also main contributors to the “constant baseline” of alarms.
In this case, what is important to understand is that the 2 key combined metrics are :
The PRESENCE : This is the number of 10 minutes timestamps where the alarm is present
The FREQUENCY : This is the number of alarms, so the number of occurences per each of these 10 minutes timestamps.
If for example 5 meters pick up a “THD voltage alarm” condition which appears for a short duration on an average of 5 times in every one of the 10 minutes intervals during that month, the system again would end up with a constant average number of alarms of 25 alarms per 10 minutes time interval.
Here is a graph illustrating the impact of the constant alarms on this month’s presence of alarms in each 10 minute timestamp.
This represents a reduction of 65 % of the presence of alarms in all the 10 minutes timestamps.
How would the removal or aggregation of FLEETING alarms improve the number of present alamrs
So if we were able to remove the stale alarms, here is what the monthly number of alarms would look like for each 10 minutes timestamp.
If we stack all 3 together, how much would we solve ?
By adding all STALE + CONSTANT CHATTERING + FLEETING, we get the following detailed result : Below is the graph per 10 minutes timestamp.
HOW TO REDUCE THE NUMBER OF NUISANCE ALARMS
Alarms sources where most of the alarms appear
Monthly spread of sources of all alarms
An important metric to look at on a monthly basis is the number of Sources generating new/recurring alarms.
- List of Top 10 sources generating the alarms
– With their number of alarms generated per source
– And the respective percentage of all alarms generated per source
| SourceId | Nr_Alarms | Perc_alarms | Rank_meters | chattering | Flood_state |
|---|---|---|---|---|---|
| 388 | 19354 | 52 | 1 | TRUE | TRUE |
| 3 | 12393 | 34 | 2 | TRUE | TRUE |
| 34 | 379 | 1 | 3 | TRUE | TRUE |
| 35 | 357 | 1 | 4 | TRUE | TRUE |
| 237 | 311 | 1 | 5 | TRUE | TRUE |
| 33 | 269 | 1 | 6 | TRUE | TRUE |
| 220 | 209 | 1 | 7 | TRUE | TRUE |
| 262 | 199 | 1 | 8 | TRUE | TRUE |
| 158 | 196 | 1 | 9 | TRUE | TRUE |
| 153 | 193 | 1 | 10 | TRUE | TRUE |
- This provides an idea of the spread of new/recurring issues :
– Maybe only very few devices generate 80% of all new/recurring alarms. In this case, it’s easy to focus the attention on these sources.
– Or, maybe all devices capable of picking up a specific type of alarm capture it. In this case, the event may be generated upstream of all these devices (e.g., a Voltage sag, coming from the utility, or a welding manufacturer next to the monitored facility ?).
This then needs to be compare with the total number of sources which generated at least one alarm during this month :
- Below’s table shows the total number of sources of all alarms, as well as a splitt per type of generated alarms (number of chattering, flood, stale)
| Metric | Nr.of.SourceId | Nr.of.Previous.SourceId |
|---|---|---|
| All | 128 | 121 |
| Chattering | 113 | 103 |
| Flood | 128 | 121 |
| Stale | 14 | 19 |
And the next table shows the same, but by relative percentages :
| Metric | Perc.of.SourceId | Perc.of.Previous.SourceId |
|---|---|---|
| All | 100 | 100 |
| Chattering | 88 | 85 |
| Flood | 100 | 100 |
| Stale | 11 | 16 |
Monthly spread of sources of the “Stale” alarms
Another linked metric to look at is the source of lasting alarms (alarms which last longer than 10 minutes).
- Some alarms will stay “on” for a several 10 minutes intervals (e.G., several alarms on harmonics/THD levels above acceptable threshold, measured by 5 different meters in a specific location, lasting for 8 hours in an industrial site, during a specific process step).
– This increases the constant number of alarms during such extended periods, and may increase the number of 10 minute periods with more than 10 alarms.
– In terms of recommendations, this may help focus investigation on these meters and time periods leveraging the types of alarms and the correlation of these meters and alarms as a group.
The following table will show the list of SourceIds generating more than 0.5 % of all new/recurring issues (percentage of the number of different new alarms of this month)
Top 10 or 50 List ranked by decreasing presence & duration, duration of each, priority grouping, etc.
This table will help understand what are the most frequent and present stale alarms.
What would the processing of chattering/fleeting alarms do for your alarm system this month ?
## [1] 36991
Why would the user care ?
Well, we have identified that 99 percent of all the alarms are classified as “Chattering/Fleeting”.
How would this report look like if you were able to remove these chattering alarms :
Filtering out or aggregating the alarms which regurlarly or constantly hit your system
Your system has 31303 identified as being “regular / constant alarms”
These “regular / constant alarms” represent :
– As much as 50.3 percent of the 10 minutes timestamps.
– Yet they only represent 5.3 percent of the total number of alarms.
– This means… that each one of these alarms is much more present than most of the other alarms (by a ratio of 9.4 times more present than the other alarms).
We recommend to start identifying these types of chattering alarms. The reason is simple : These alarms will be present in many 10 minutes intervals, and so will be main contributors to the baseline (the minimum number of alarms occurring per 10 minutes interval)
And to do this we recommend using a threshold of 8.3 percent of all the 10 minutes interval to determine this type of alarms.
This threshold will detect alarms which hit your system at least once every 2 hours. This 2 hours threshold is important as some alarms may be calculated over a given time interval (such as some average values). And typically, these intervals last 10 minutes or 1 hour, but in certain cases, up to 2 hours. So, by using this 2 hour threshold, this table will accurately capture these frequently occurring alarms.
So you could reduce the number of alarms by
Filtering these alarms (they would become 0 alarms). Before you do this, you must analyze these constantly hitting alarms to understand if these are false alarms (e.G., such as when a threshold is set to wrong threshold or wrong nominal voltage). You should not remove any alarms without doing any analysis.
Or by aggregating these alarms and adding a counter number counting the number of alarms and/or a number of 10 minutes intervals where these alarms are present during this month (each alarm would become 1 alarm). The advantage of creating such a table is that you keep all the information visible and available for analysis in a much more synthetic way, and you avoid unnecessarily cluttering the other alarms with these cosntanty occuring alarms.
Here is an example of such an aggregation table :
| Alarm_text_number_of_10_minute_timestamps | Alarm_text_percent_of_10_minute_timestamps | Alarm_text_percent_of_all_alarms_timestamps | total_number_of_10minutes_intervals | Cause_text | Effect_text | SourceId | Priority | Alarm_text_SourceAlarm_text | constant_alarms_nr_alarms | stale |
|---|---|---|---|---|---|---|---|---|---|---|
| 2607 | 60.3 | 2.0 | 4320 | Current C@SanderTunnel10_65_1_254.Sigma_Commons | Potential Power Loss | 3 | 150 | Current C@SanderTunnel10_65_1_254.Sigma_Commons_Potential Power Loss_3 | 31303 | 0 |
| 2711 | 62.7 | 3.4 | 4320 | Current A@SanderTunnel10_65_1_254.Sigma_Commons | Potential Power Loss | 3 | 150 | Current A@SanderTunnel10_65_1_254.Sigma_Commons_Potential Power Loss_3 | 31303 | 0 |
| 1320 | 30.5 | 0.9 | 4320 | Over THD Current C Alarm | Over THD Current C Alarm | 95 | 128 | Over THD Current C Alarm_Over THD Current C Alarm_95 | 31303 | 0 |
| 549 | 12.7 | 7.6 | 4320 | Current B@SanderTunnel10_65_1_254.Sigma_Commons | Potential Power Loss | 3 | 150 | Current B@SanderTunnel10_65_1_254.Sigma_Commons_Potential Power Loss_3 | 31303 | 0 |
| 4320 | 100.0 | 3.1 | 4320 | Voltage Magnitude 10-minute Mean on Input V2 | Voltage Magnitude Count N1 on Input V2 | 388 | 50 | Voltage Magnitude 10-minute Mean on Input V2_Voltage Magnitude Count N1 on Input V2_388 | 31303 | 0 |
| 4320 | 100.0 | 3.1 | 4320 | Voltage Magnitude 10-minute Mean on Input V3 | Voltage Magnitude Count N1 on Input V3 | 388 | 50 | Voltage Magnitude 10-minute Mean on Input V3_Voltage Magnitude Count N1 on Input V3_388 | 31303 | 0 |
| 4320 | 100.0 | 3.1 | 4320 | V NegSeqMag10m | Voltage Unbalance Count N1 | 388 | 50 | V NegSeqMag10m_Voltage Unbalance Count N1_388 | 31303 | 0 |
| 4320 | 100.0 | 3.1 | 4320 | Voltage Magnitude 10-minute Mean on Input V1 | Voltage Magnitude Count N1 on Input V1 | 388 | 50 | Voltage Magnitude 10-minute Mean on Input V1_Voltage Magnitude Count N1 on Input V1_388 | 31303 | 0 |
| 4320 | 100.0 | 3.3 | 4320 | Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 34 | 128 | Over THD Voltage B-C Alarm_Over THD Voltage B-C Alarm_34 | 31303 | 0 |
| 522 | 12.0 | 0.3 | 4320 | Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 192 | 128 | Over THD Voltage A-N Alarm_Over THD Voltage A-N Alarm_192 | 31303 | 0 |
| 510 | 11.8 | 0.3 | 4320 | Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 192 | 128 | Over THD Voltage B-N Alarm_Over THD Voltage B-N Alarm_192 | 31303 | 0 |
| 544 | 12.5 | 0.4 | 4320 | Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 192 | 128 | Over THD Voltage A-B Alarm_Over THD Voltage A-B Alarm_192 | 31303 | 0 |
| 405 | 9.3 | 0.2 | 4320 | Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 192 | 128 | Over THD Voltage B-C Alarm_Over THD Voltage B-C Alarm_192 | 31303 | 0 |
| 457 | 10.5 | 0.3 | 4320 | Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 192 | 128 | Over THD Voltage C-A Alarm_Over THD Voltage C-A Alarm_192 | 31303 | 0 |
| 368 | 8.5 | 0.2 | 4320 | Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 192 | 128 | Over THD Voltage C-N Alarm_Over THD Voltage C-N Alarm_192 | 31303 | 0 |
| 3793 | 87.8 | 3.4 | 4320 | CHW Supply Temp | SP{0} Status|12 | 388 | 128 | CHW Supply Temp_SP{0} Status|12_388 | 31303 | 0 |
| 4320 | 100.0 | 3.1 | 4320 | CHW Flow | SP{0} Status|11 | 388 | 128 | CHW Flow_SP{0} Status|11_388 | 31303 | 0 |
| 1952 | 45.1 | 1.4 | 4320 | Voltage Phases AB | Voltage Sag A-B Alarm | 263 | 128 | Voltage Phases AB_Voltage Sag A-B Alarm_263 | 31303 | 0 |
| 1952 | 45.1 | 1.4 | 4320 | Voltage Phases BC | Voltage Sag B-C Alarm | 263 | 128 | Voltage Phases BC_Voltage Sag B-C Alarm_263 | 31303 | 0 |
| 1952 | 45.1 | 1.4 | 4320 | Voltage Phases CA | Voltage Sag C-A Alarm | 263 | 128 | Voltage Phases CA_Voltage Sag C-A Alarm_263 | 31303 | 0 |
| 1952 | 45.1 | 1.4 | 4320 | Frequency | Under Frequency Alarm | 263 | 128 | Frequency_Under Frequency Alarm_263 | 31303 | 0 |
| 4077 | 94.3 | 3.0 | 4320 | Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 128 | Over THD Voltage C-A Alarm_Over THD Voltage C-A Alarm_237 | 31303 | 0 |
| 4169 | 96.5 | 3.0 | 4320 | Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 128 | Over THD Voltage C-N Alarm_Over THD Voltage C-N Alarm_237 | 31303 | 0 |
| 4216 | 97.5 | 3.1 | 4320 | Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 128 | Over THD Voltage B-C Alarm_Over THD Voltage B-C Alarm_237 | 31303 | 0 |
| 4296 | 99.4 | 3.2 | 4320 | Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 237 | 128 | Over THD Voltage A-N Alarm_Over THD Voltage A-N Alarm_237 | 31303 | 0 |
| 4313 | 99.8 | 3.1 | 4320 | Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 237 | 128 | Over THD Voltage A-B Alarm_Over THD Voltage A-B Alarm_237 | 31303 | 0 |
Here is how the total number of alarms would look like if you applied this recommended aggregation :
Filtering or aggregating the other chattering / fleeting and low priority alarms
This represents the second part of the chattering / fleeting alarms
Number of fleeting & low priority alarms,
List ranked by decreasing presence & duration, duration of each, priority grouping, etc.
Aggregating and analyzing the chattering HIGH priority alarms
Number of chattering & HIGH priority alarms,
List ranked by decreasing presence & duration, duration of each, priority grouping, etc.
Detailed Analysis
BASELINE & AMPLITUDE (synthesis)
In_Progress (description text)
- Baseline
– min value of month
– per chattering, Flood, Stale
– add a column where the date for each is provided (current month)
– current & previous month
graph
Max alarms of period (daily Nr of alarms)
– Max per Total all alarms
– per chattering, Flood, Stale
– add a column where the date for each is provided (current month)
– current & previous month
- Peak ratio
– Peak ratio calc ((Peak-min) / mean).
– current & previous month
| Metric | Min | Max | Peak_ratio | Min_previous | Max_previous | Peak_ratio_previous |
|---|---|---|---|---|---|---|
| All | 3077 | 9605 | 1.166767 | 6071 | 10391 | 0.5854022 |
| Chattering | 2211 | 8594 | 1.361261 | 5200 | 9525 | 0.6480883 |
| Flood | 3077 | 9605 | 1.166767 | 6071 | 10391 | 0.5854022 |
| Stale | 1653 | 5655 | 1.178508 | 3712 | 6624 | 0.6607755 |
Daily view of the number of alarms visualization
The following graph shows the number of alarms per day
Each line is a day of the month
Each column shows the day of the week
This helps visually see if We have any obvious day of week where more alarms appear over the month (e.G., on every Friday vs. the other days of the week, or on workings days vs. week-end days)
Hourly view of the number of alarms visualization
The following graph shows the number of alarms per hour of each day
Each line is a day of the month
Each hour is then visible as a colored rectangle
This helps visually see if We have any obvious time of day related patterns (such as typical hours where more alarms are generated, or working hours vs. shutdown hours changes).
Important remark : Graphs are in UTC and not in local hours !!!
Analysis insights - Overall “Presence of alarms” system health
NEW : Added CONSTANT PRESENCE Baseline (ADEL)
- Baseline : “Constantly present/ON” (chattering or not) alarms
– Identify SourceIds present in >80% of “10 min timestamps”
— count (presence 1/0 of SourceId in each “10 minutes timestamp”) / (total number of “10 minutes timestamps”)
— calc Average Frq (Nr of times per 10 minute)
– Identify related alarms (cf. above …for each SourceIds which are always present/ON)
— Identify alarms (text & SourceIds) present in >80% of 10 min timestamps
—- Presence (%) & Average Frq (Nr of times per 10 minute)
— Identify alarms (text & SourceIds) not80% present their respective percentage of presence (presence / total 10 min timestamps)
—- Presence (%) & Average Frq (Nr of times per 10 minute)
Monthly Severity analysis of alarms (Nr of alarms per priority level).
In_Progress (description text)
- This … (text)
| Priority | Perc_Current_month | Perc_Previous_month | Current_month | Previous_month |
|---|---|---|---|---|
| Low | 50 % | 27 % | 18524 | 18952 |
| Medium | 0 % | 0 % | 0 | 0 |
| High | 16 % | 10 % | 6034 | 6714 |
Future metrics:
IMPACT: Future component to be integrated in R2 (measurements based such as Load Loss“, or derived from the alarms via words which show potential impact such as”Voltage unbalance“,”phase loss“,”voltage interruption")
RESOLVABLE: Future component to be integrated in R2 (nuisance identification, nuisance recommendation, impacting, links analysis with potential groups/causes/origins indications to help user focus)
RECOMMENDATION Text & spec of table (JOHANNES)
Baseline : “Constantly present/ON” (chattering or not) alarms
– Identify SourceIds present in >80% of “10 min timestamps”
– Identify related alarms (cf. above …for each SourceIds which are always present/ON)
— Identify alarms (text & SourceIds) present in >80% of 10 min timestamps
— Identify alarms (text & SourceIds) not80% present their respective percentage of presence (presence / total 10 min timestamps)
Recommendations potential of resolution
Chattering low priority alarms
- (not associated with any chronic potential impactful alarms) : Filter
Chronic chattering high priority alarms (Group and analyze) :
Group to reduce number of alarms and floods, and analyze priority (potential impact) as well as identify cause.
Provide possible origin or location, as well as all related links (co-occuring alarms) and sequences (first measurement triggering alams per meter = precise, cross meters = fuzzy but may be regular because of time drift potential)
Chronic chattering potentialy impactful alarm not high priority :
- Review situation and either filter if low priority is confirmed (no impacted potential Load type) or change priority
Stale alarms (coming)
Analysis insights - Details on Number of Alarms
Daily Number of alarms
This shows a simplified table of all alarms for each day
This should be changed to a daily metric (average Nr of alarm per day)
Number of alarms per 10 minute period
In_Progress (description text)
Number of alarms per hourly period
In_Progress (description text)
Calculate the daily baseline on number of alarms:
Do we have days with 0 values ? If yes, how many (as value and as % of the month).
Current month & previous month
If not, then what is the min value?
Tag the day (identify the date as usable variable in text) for further alarms analysis (alarms list as constant to be analyzed).
Current month & previous month
ADEL # 5
PEAK analysis on number of alarms
When is the max day ?
What is the max value ?
Peak ratio calc ((Peak-min) / mean).
Current month & previous month
ADEL # 4
Typical day analysis on number of alarms
- Statistical distribution :
– calculate the Q2 and use this to Median day identification.
– IQR analysis (means that we identify the range of 50% variance value of Nr of alarms of Q3 & Q1).
- Current month & previous month
Top 10
Top 10 METERS generating the alarms
Summary table
- as numbers
– Top 10 (sum(freq))
– More than 10 (%)
– chattering (%)
– Flood (%)
– Stale (future) (%)
List table (PRIO 1) => 1 table
Top 10/50 generated ALARMS
Summary table
- Most frequent ALARM - List (Top 10)
– Top 10 (sum(freq))
– More than 10 (%)
– chattering (%)
– Flood (%)
– Stale (future) (%)
List table (PRIO 1) => 1 table
- Top 50 Alarms (with SourceIds)
– List by decreasing rank
– as alarms text
— Cause_text, Effect_text, SourceId, Freq, Rank (group_by SourceId, Alarm_Text, ….Freq(on Nr of ID)) … NOT cause_value NOT effect_value
| Cause_text | Effect_text | SourceId | Nr_Alarms | Rank_alarms | chattering | Flood_state |
|---|---|---|---|---|---|---|
| Current B@SanderTunnel10_65_1_254.Sigma_Commons | Potential Power Loss | 3 | 10305 | 1 | TRUE | TRUE |
| Voltage Magnitude 10-minute Mean on Input V2 | Voltage Magnitude Count N1 on Input V2 | 388 | 4320 | 2 | TRUE | TRUE |
| Voltage Magnitude 10-minute Mean on Input V3 | Voltage Magnitude Count N1 on Input V3 | 388 | 4320 | 2 | TRUE | TRUE |
| V NegSeqMag10m | Voltage Unbalance Count N1 | 388 | 4320 | 2 | TRUE | TRUE |
| Voltage Magnitude 10-minute Mean on Input V1 | Voltage Magnitude Count N1 on Input V1 | 388 | 4320 | 2 | TRUE | TRUE |
| Current A@SanderTunnel10_65_1_254.Sigma_Commons | Potential Power Loss | 3 | 1831 | 3 | TRUE | TRUE |
| CHW Supply Temp | SP{0} Status|12 | 388 | 975 | 4 | TRUE | TRUE |
| CHW Supply Temp | Supply Temp | 388 | 974 | 5 | TRUE | TRUE |
| Current C@SanderTunnel10_65_1_254.Sigma_Commons | Potential Power Loss | 3 | 234 | 6 | TRUE | TRUE |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 34 | 200 | 7 | TRUE | TRUE |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 35 | 188 | 8 | TRUE | TRUE |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 34 | 179 | 9 | TRUE | TRUE |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 35 | 169 | 10 | TRUE | TRUE |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 33 | 164 | 11 | TRUE | TRUE |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 237 | 115 | 12 | TRUE | TRUE |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 114 | 13 | TRUE | TRUE |
| Ethernet | Clock {0}|1 | 388 | 106 | 14 | TRUE | TRUE |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 33 | 104 | 15 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 220 | 92 | 16 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 262 | 77 | 17 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 162 | 74 | 18 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 158 | 70 | 19 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 153 | 70 | 19 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 219 | 70 | 19 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 159 | 68 | 20 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 161 | 68 | 20 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 154 | 68 | 20 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 156 | 68 | 20 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 165 | 68 | 20 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 66 | 66 | 21 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 262 | 65 | 22 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 158 | 61 | 23 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 161 | 61 | 23 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 158 | 61 | 23 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 159 | 60 | 24 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 153 | 60 | 24 | TRUE | TRUE |
| Power-Up or Reset | Power-Up or Reset | 129 | 60 | 24 | TRUE | TRUE |
| Status Input {0} Trans. from Off to On|1 | Status Input {0} Trans. from Off to On|1 | 129 | 60 | 24 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 156 | 59 | 25 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 154 | 59 | 25 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 153 | 59 | 25 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 162 | 58 | 26 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 219 | 58 | 26 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 162 | 58 | 26 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 165 | 58 | 26 | TRUE | TRUE |
| Power-Up or Reset | Power-Up or Reset | 30 | 58 | 26 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 159 | 58 | 26 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 66 | 57 | 27 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 66 | 57 | 27 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 220 | 57 | 27 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 156 | 57 | 27 | TRUE | TRUE |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 56 | 28 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 220 | 56 | 28 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 262 | 55 | 29 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 165 | 55 | 29 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 161 | 55 | 29 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 219 | 51 | 30 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 154 | 51 | 30 | TRUE | TRUE |
| Lagging Power Factor Alarm | Lagging Power Factor Alarm | 222 | 46 | 31 | FALSE | TRUE |
| Protection Manager - SW | SW Trip Unit Door Status | 270 | 45 | 32 | TRUE | TRUE |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 192 | 38 | 33 | TRUE | TRUE |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 192 | 37 | 34 | TRUE | TRUE |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 192 | 35 | 35 | TRUE | TRUE |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 192 | 34 | 36 | TRUE | TRUE |
| NULL | NULL | 1 | 30 | 37 | TRUE | TRUE |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 47 | 22 | 38 | TRUE | TRUE |
| Over THD Current C Alarm | Over THD Current C Alarm | 95 | 19 | 39 | TRUE | TRUE |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 192 | 19 | 39 | TRUE | TRUE |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 192 | 19 | 39 | TRUE | TRUE |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 18 | 40 | TRUE | TRUE |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 56 | 18 | 40 | TRUE | TRUE |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 47 | 16 | 41 | TRUE | TRUE |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 47 | 16 | 41 | TRUE | TRUE |
| Chassis Manager - SW | SW Time Loss (Cradle Comms Module) | 273 | 14 | 42 | TRUE | TRUE |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 375 | 12 | 43 | TRUE | TRUE |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 56 | 11 | 44 | TRUE | TRUE |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 56 | 11 | 44 | TRUE | TRUE |
| Chassis Manager - SW | SW Time Loss (Cradle Comms Module) | 271 | 11 | 44 | TRUE | TRUE |
| Chassis Manager - SW | SW Time Loss (Cradle Comms Module) | 274 | 11 | 44 | TRUE | TRUE |
| Power-Up or Reset | Power-Up or Reset | 226 | 10 | 45 | TRUE | TRUE |
| Chassis Manager - SW | SW Time Loss (Cradle Comms Module) | 272 | 10 | 45 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 380 | 9 | 46 | TRUE | TRUE |
| Current C@SceneShop10_133_2_236.Scene_Shop_120volt | Potential Power Loss | 3 | 9 | 46 | TRUE | TRUE |
| Frequency | Under Frequency Alarm | 263 | 8 | 47 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 122 | 8 | 47 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 109 | 8 | 47 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 126 | 8 | 47 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 123 | 8 | 47 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 119 | 8 | 47 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 113 | 8 | 47 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 111 | 8 | 47 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 117 | 8 | 47 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 114 | 8 | 47 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 115 | 8 | 47 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 65 | 8 | 47 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 169 | 8 | 47 | TRUE | TRUE |
| Chassis Manager - SW | SW Time Loss (Cradle Comms Module) | 266 | 8 | 47 | TRUE | TRUE |
| Chassis Manager - SW | SW Time Loss (Cradle Comms Module) | 276 | 8 | 47 | TRUE | TRUE |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 375 | 8 | 47 | TRUE | TRUE |
| CHW Flow | SP{0} Status|11 | 388 | 7 | 48 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 263 | 7 | 48 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 263 | 7 | 48 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 263 | 7 | 48 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 152 | 7 | 48 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 166 | 7 | 48 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 116 | 7 | 48 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 120 | 7 | 48 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 124 | 7 | 48 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 125 | 7 | 48 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 118 | 7 | 48 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 112 | 7 | 48 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 64 | 7 | 48 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 164 | 7 | 48 | TRUE | TRUE |
| Chassis Manager - SW | SW Time Loss (Cradle Comms Module) | 277 | 7 | 48 | TRUE | TRUE |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 375 | 7 | 48 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 152 | 6 | 49 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 160 | 6 | 49 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 218 | 6 | 49 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 63 | 6 | 49 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 163 | 6 | 49 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 157 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 113 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 119 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 115 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 126 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 123 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 112 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 118 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 125 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 109 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 116 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 122 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 124 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 120 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 164 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 169 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 64 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 65 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 111 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 114 | 6 | 49 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 117 | 6 | 49 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 63 | 6 | 49 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 218 | 6 | 49 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 160 | 6 | 49 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 163 | 6 | 49 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 166 | 6 | 49 | TRUE | TRUE |
| Voltage Phases CA | Voltage Sag C-A Alarm | 157 | 6 | 49 | TRUE | TRUE |
| Chassis Manager - SW | SW Time Loss (Cradle Comms Module) | 275 | 6 | 49 | TRUE | TRUE |
| CHW Flow | Flow | 388 | 6 | 49 | TRUE | TRUE |
| Ethernet | Front Panel | 388 | 6 | 49 | TRUE | TRUE |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 237 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 126 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 113 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 123 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 119 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 112 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 120 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 109 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 125 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 122 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 116 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 118 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 111 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 114 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 117 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 115 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 164 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 169 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 380 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 64 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Sag B-C Alarm | 65 | 5 | 50 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 166 | 5 | 50 | TRUE | TRUE |
| Voltage Phases AB | Voltage Sag A-B Alarm | 160 | 5 | 50 | TRUE | TRUE |
| Circuit Breaker Manager - SW | SW Time Loss (Breaker Comms Module) | 275 | 5 | 50 | TRUE | TRUE |
| Circuit Breaker Manager - SW | SW Time Loss (Breaker Comms Module) | 277 | 5 | 50 | TRUE | TRUE |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 375 | 5 | 50 | TRUE | TRUE |
| Power-Up or Reset | Power-Up or Reset | 70 | 5 | 50 | TRUE | TRUE |
| Voltage Phases BC | Voltage Swell B-C Alarm | 263 | 5 | 50 | TRUE | TRUE |
Other output
Graphs
BEFORE / AFTER chattering removal
Per recommendation, show before/after graphs
filter low priority chattering
analyze constant chattering issues (if high priority)
Links analysis
- correlations & time patterns
– co-occurence matrix (top 50 alarms as columns, 10min bins as rows)
– create co-occurence or correlation (pairwise?) matrix
– create graph
Per alarm (SourceId & Alarm text) top 3/10/50
Total Nr
Chattering
Flood
Stale alarms
Top 50 list of Stale alarms
| Cause_text | Effect_text | SourceId | ID | Nr_Stale | Rank_alarms | Alarm_text_stale_number_of_10_minute_timestamps | Alarm_text_number_of_staleIDs | Rank_presence | Rank_IDs | Alarm_text_percent_stale_of_10_minute_timestamps | Alarm_text_percent_stale_of_all_alarms_timestamps |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 237 | 395884 | 4322 | 1 | 4320 | 3 | 1 | 4 | 100.0 | 3.1 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 237 | 451175 | 4322 | 1 | 4320 | 3 | 1 | 4 | 100.0 | 3.1 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 237 | 452246 | 4322 | 1 | 4320 | 3 | 1 | 4 | 100.0 | 3.1 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 34 | 205439 | 4320 | 2 | 4320 | 1 | 1 | 6 | 100.0 | 3.1 |
| Voltage Phases AB | Voltage Sag A-B Alarm | 259 | 335907 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases BC | Voltage Sag B-C Alarm | 259 | 335908 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases CA | Voltage Sag C-A Alarm | 259 | 335909 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases CN | Voltage Sag C-N Alarm | 259 | 335913 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases BN | Voltage Sag B-N Alarm | 259 | 335914 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases AN | Voltage Sag A-N Alarm | 259 | 335915 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases AB | Voltage Sag A-B Alarm | 259 | 434933 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases BC | Voltage Sag B-C Alarm | 259 | 434934 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases CA | Voltage Sag C-A Alarm | 259 | 434935 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases CN | Voltage Sag C-N Alarm | 259 | 434936 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases BN | Voltage Sag B-N Alarm | 259 | 434937 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases AN | Voltage Sag A-N Alarm | 259 | 434938 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 237 | 395886 | 4266 | 4 | 4266 | 2 | 3 | 5 | 98.7 | 3.1 |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 237 | 452364 | 4266 | 4 | 4266 | 2 | 3 | 5 | 98.7 | 3.1 |
| Current Unbalance B Alarm | Current Unbalance B Alarm | 138 | 438253 | 4217 | 5 | 4217 | 3 | 4 | 4 | 97.6 | 3.0 |
| Current Unbalance B Alarm | Current Unbalance B Alarm | 138 | 438257 | 4217 | 5 | 4217 | 3 | 4 | 4 | 97.6 | 3.0 |
| Current Unbalance B Alarm | Current Unbalance B Alarm | 138 | 438267 | 4217 | 5 | 4217 | 3 | 4 | 4 | 97.6 | 3.0 |
| CHW Flow | SP{0} Status|11 | 388 | 356894 | 4151 | 6 | 4150 | 4 | 5 | 3 | 96.0 | 3.0 |
| CHW Flow | SP{0} Status|11 | 388 | 424581 | 4151 | 6 | 4150 | 4 | 5 | 3 | 96.0 | 3.0 |
| CHW Flow | SP{0} Status|11 | 388 | 434334 | 4151 | 6 | 4150 | 4 | 5 | 3 | 96.0 | 3.0 |
| CHW Flow | SP{0} Status|11 | 388 | 437594 | 4151 | 6 | 4150 | 4 | 5 | 3 | 96.0 | 3.0 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 395887 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 438764 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 439858 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 442635 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 444567 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 448601 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 237 | 395883 | 3470 | 8 | 3468 | 2 | 7 | 5 | 80.2 | 2.5 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 237 | 439899 | 3470 | 8 | 3468 | 2 | 7 | 5 | 80.2 | 2.5 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 395885 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 438776 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 439863 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 442654 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 444566 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 395888 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 401228 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 438777 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 439947 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 444590 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Current A Alarm | Over THD Current A Alarm | 95 | 55319 | 2839 | 11 | 2839 | 1 | 10 | 6 | 65.7 | 2.0 |
| Over THD Current B Alarm | Over THD Current B Alarm | 95 | 128744 | 2825 | 12 | 2825 | 1 | 11 | 6 | 65.3 | 2.0 |
| CHW Supply Temp | SP{0} Status|12 | 388 | 390181 | 2785 | 13 | 2785 | 5 | 12 | 2 | 64.4 | 2.0 |
| CHW Supply Temp | SP{0} Status|12 | 388 | 411341 | 2785 | 13 | 2785 | 5 | 12 | 2 | 64.4 | 2.0 |
| CHW Supply Temp | SP{0} Status|12 | 388 | 433011 | 2785 | 13 | 2785 | 5 | 12 | 2 | 64.4 | 2.0 |
| CHW Supply Temp | SP{0} Status|12 | 388 | 439199 | 2785 | 13 | 2785 | 5 | 12 | 2 | 64.4 | 2.0 |
| CHW Supply Temp | SP{0} Status|12 | 388 | 441946 | 2785 | 13 | 2785 | 5 | 12 | 2 | 64.4 | 2.0 |
| Voltage Phases AB | Voltage Sag A-B Alarm | 263 | 398250 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Voltage Phases BC | Voltage Sag B-C Alarm | 263 | 398251 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Voltage Phases CA | Voltage Sag C-A Alarm | 263 | 398252 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Frequency | Under Frequency Alarm | 263 | 398268 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Voltage Phases CA | Voltage Sag C-A Alarm | 263 | 430403 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Voltage Phases AB | Voltage Sag A-B Alarm | 263 | 430404 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Voltage Phases BC | Voltage Sag B-C Alarm | 263 | 430405 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Frequency | Under Frequency Alarm | 263 | 430408 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| 0x9d00001@SanderTunnel10_65_1_254.Sigma_Commons | Potential Power Loss | 3 | 230212 | 1831 | 15 | 1831 | 1 | 14 | 6 | 42.3 | 1.3 |
| Current C@SanderTunnel10_65_1_254.Sigma_Commons | Potential Power Loss | 3 | 442797 | 1189 | 16 | 1189 | 1 | 15 | 6 | 27.5 | 0.8 |
| Current A@SanderTunnel10_65_1_254.Sigma_Commons | Potential Power Loss | 3 | 442796 | 1178 | 17 | 1178 | 1 | 16 | 6 | 27.2 | 0.8 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 28 | 294162 | 982 | 18 | 982 | 2 | 17 | 5 | 22.7 | 0.7 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 28 | 430395 | 982 | 18 | 982 | 2 | 17 | 5 | 22.7 | 0.7 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 28 | 294161 | 980 | 19 | 980 | 2 | 18 | 5 | 22.6 | 0.7 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 28 | 430394 | 980 | 19 | 980 | 2 | 18 | 5 | 22.6 | 0.7 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 228 | 404643 | 536 | 20 | 536 | 1 | 19 | 6 | 12.4 | 0.3 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 222 | 407539 | 502 | 21 | 502 | 1 | 20 | 6 | 11.6 | 0.3 |
| Over THD Current A Alarm | Over THD Current A Alarm | 225 | 440001 | 453 | 22 | 453 | 1 | 21 | 6 | 10.4 | 0.3 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 192 | 402347 | 295 | 23 | 295 | 1 | 22 | 6 | 6.8 | 0.2 |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 192 | 402348 | 295 | 23 | 295 | 1 | 22 | 6 | 6.8 | 0.2 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 192 | 402409 | 289 | 24 | 289 | 1 | 23 | 6 | 6.6 | 0.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 192 | 402413 | 288 | 25 | 288 | 1 | 24 | 6 | 6.6 | 0.2 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 192 | 402498 | 285 | 26 | 285 | 1 | 25 | 6 | 6.5 | 0.2 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 28 | 402474 | 283 | 27 | 283 | 1 | 26 | 6 | 6.5 | 0.2 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 192 | 402499 | 268 | 28 | 268 | 1 | 27 | 6 | 6.2 | 0.1 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 228 | 404641 | 248 | 29 | 248 | 1 | 28 | 6 | 5.7 | 0.1 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 228 | 404642 | 248 | 29 | 248 | 1 | 28 | 6 | 5.7 | 0.1 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 225 | 407517 | 213 | 30 | 213 | 1 | 29 | 6 | 4.9 | 0.1 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 225 | 407518 | 213 | 30 | 213 | 1 | 29 | 6 | 4.9 | 0.1 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 191 | 407237 | 211 | 31 | 211 | 1 | 30 | 6 | 4.8 | 0.1 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 191 | 407238 | 210 | 32 | 210 | 1 | 31 | 6 | 4.8 | 0.1 |
Recurring (SourceId & Cause/Effect text, any groups)
| Cause_text | Effect_text | SourceId | ID | Nr_Stale | Rank_alarms | Alarm_text_stale_number_of_10_minute_timestamps | Alarm_text_number_of_staleIDs | Rank_presence | Rank_IDs | Alarm_text_percent_stale_of_10_minute_timestamps | Alarm_text_percent_stale_of_all_alarms_timestamps |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 237 | 395884 | 4322 | 1 | 4320 | 3 | 1 | 4 | 100.0 | 3.1 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 237 | 451175 | 4322 | 1 | 4320 | 3 | 1 | 4 | 100.0 | 3.1 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 237 | 452246 | 4322 | 1 | 4320 | 3 | 1 | 4 | 100.0 | 3.1 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 34 | 205439 | 4320 | 2 | 4320 | 1 | 1 | 6 | 100.0 | 3.1 |
| Voltage Phases AB | Voltage Sag A-B Alarm | 259 | 335907 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases BC | Voltage Sag B-C Alarm | 259 | 335908 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases CA | Voltage Sag C-A Alarm | 259 | 335909 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases CN | Voltage Sag C-N Alarm | 259 | 335913 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases BN | Voltage Sag B-N Alarm | 259 | 335914 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases AN | Voltage Sag A-N Alarm | 259 | 335915 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases AB | Voltage Sag A-B Alarm | 259 | 434933 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases BC | Voltage Sag B-C Alarm | 259 | 434934 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases CA | Voltage Sag C-A Alarm | 259 | 434935 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases CN | Voltage Sag C-N Alarm | 259 | 434936 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases BN | Voltage Sag B-N Alarm | 259 | 434937 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases AN | Voltage Sag A-N Alarm | 259 | 434938 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 237 | 395886 | 4266 | 4 | 4266 | 2 | 3 | 5 | 98.7 | 3.1 |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 237 | 452364 | 4266 | 4 | 4266 | 2 | 3 | 5 | 98.7 | 3.1 |
| Current Unbalance B Alarm | Current Unbalance B Alarm | 138 | 438253 | 4217 | 5 | 4217 | 3 | 4 | 4 | 97.6 | 3.0 |
| Current Unbalance B Alarm | Current Unbalance B Alarm | 138 | 438257 | 4217 | 5 | 4217 | 3 | 4 | 4 | 97.6 | 3.0 |
| Current Unbalance B Alarm | Current Unbalance B Alarm | 138 | 438267 | 4217 | 5 | 4217 | 3 | 4 | 4 | 97.6 | 3.0 |
| CHW Flow | SP{0} Status|11 | 388 | 356894 | 4151 | 6 | 4150 | 4 | 5 | 3 | 96.0 | 3.0 |
| CHW Flow | SP{0} Status|11 | 388 | 424581 | 4151 | 6 | 4150 | 4 | 5 | 3 | 96.0 | 3.0 |
| CHW Flow | SP{0} Status|11 | 388 | 434334 | 4151 | 6 | 4150 | 4 | 5 | 3 | 96.0 | 3.0 |
| CHW Flow | SP{0} Status|11 | 388 | 437594 | 4151 | 6 | 4150 | 4 | 5 | 3 | 96.0 | 3.0 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 395887 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 438764 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 439858 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 442635 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 444567 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 448601 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 237 | 395883 | 3470 | 8 | 3468 | 2 | 7 | 5 | 80.2 | 2.5 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 237 | 439899 | 3470 | 8 | 3468 | 2 | 7 | 5 | 80.2 | 2.5 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 395885 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 438776 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 439863 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 442654 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 444566 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 395888 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 401228 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 438777 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 439947 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 444590 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
Complete list
| Cause_text | Effect_text | SourceId | ID | Nr_Stale | Rank_alarms | Alarm_text_stale_number_of_10_minute_timestamps | Alarm_text_number_of_staleIDs | Rank_presence | Rank_IDs | Alarm_text_percent_stale_of_10_minute_timestamps | Alarm_text_percent_stale_of_all_alarms_timestamps |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 237 | 395884 | 4322 | 1 | 4320 | 3 | 1 | 4 | 100.0 | 3.1 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 237 | 451175 | 4322 | 1 | 4320 | 3 | 1 | 4 | 100.0 | 3.1 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 237 | 452246 | 4322 | 1 | 4320 | 3 | 1 | 4 | 100.0 | 3.1 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 34 | 205439 | 4320 | 2 | 4320 | 1 | 1 | 6 | 100.0 | 3.1 |
| Voltage Phases AB | Voltage Sag A-B Alarm | 259 | 335907 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases BC | Voltage Sag B-C Alarm | 259 | 335908 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases CA | Voltage Sag C-A Alarm | 259 | 335909 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases CN | Voltage Sag C-N Alarm | 259 | 335913 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases BN | Voltage Sag B-N Alarm | 259 | 335914 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases AN | Voltage Sag A-N Alarm | 259 | 335915 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases AB | Voltage Sag A-B Alarm | 259 | 434933 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases BC | Voltage Sag B-C Alarm | 259 | 434934 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases CA | Voltage Sag C-A Alarm | 259 | 434935 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases CN | Voltage Sag C-N Alarm | 259 | 434936 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases BN | Voltage Sag B-N Alarm | 259 | 434937 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Voltage Phases AN | Voltage Sag A-N Alarm | 259 | 434938 | 4318 | 3 | 4318 | 2 | 2 | 5 | 99.9 | 3.1 |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 237 | 395886 | 4266 | 4 | 4266 | 2 | 3 | 5 | 98.7 | 3.1 |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 237 | 452364 | 4266 | 4 | 4266 | 2 | 3 | 5 | 98.7 | 3.1 |
| Current Unbalance B Alarm | Current Unbalance B Alarm | 138 | 438253 | 4217 | 5 | 4217 | 3 | 4 | 4 | 97.6 | 3.0 |
| Current Unbalance B Alarm | Current Unbalance B Alarm | 138 | 438257 | 4217 | 5 | 4217 | 3 | 4 | 4 | 97.6 | 3.0 |
| Current Unbalance B Alarm | Current Unbalance B Alarm | 138 | 438267 | 4217 | 5 | 4217 | 3 | 4 | 4 | 97.6 | 3.0 |
| CHW Flow | SP{0} Status|11 | 388 | 356894 | 4151 | 6 | 4150 | 4 | 5 | 3 | 96.0 | 3.0 |
| CHW Flow | SP{0} Status|11 | 388 | 424581 | 4151 | 6 | 4150 | 4 | 5 | 3 | 96.0 | 3.0 |
| CHW Flow | SP{0} Status|11 | 388 | 434334 | 4151 | 6 | 4150 | 4 | 5 | 3 | 96.0 | 3.0 |
| CHW Flow | SP{0} Status|11 | 388 | 437594 | 4151 | 6 | 4150 | 4 | 5 | 3 | 96.0 | 3.0 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 395887 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 438764 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 439858 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 442635 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 444567 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 237 | 448601 | 3579 | 7 | 3578 | 6 | 6 | 1 | 82.8 | 2.6 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 237 | 395883 | 3470 | 8 | 3468 | 2 | 7 | 5 | 80.2 | 2.5 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 237 | 439899 | 3470 | 8 | 3468 | 2 | 7 | 5 | 80.2 | 2.5 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 395885 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 438776 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 439863 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 442654 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 237 | 444566 | 3329 | 9 | 3328 | 5 | 8 | 2 | 77.0 | 2.4 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 395888 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 401228 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 438777 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 439947 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 237 | 444590 | 3029 | 10 | 3028 | 5 | 9 | 2 | 70.0 | 2.2 |
| Over THD Current A Alarm | Over THD Current A Alarm | 95 | 55319 | 2839 | 11 | 2839 | 1 | 10 | 6 | 65.7 | 2.0 |
| Over THD Current B Alarm | Over THD Current B Alarm | 95 | 128744 | 2825 | 12 | 2825 | 1 | 11 | 6 | 65.3 | 2.0 |
| CHW Supply Temp | SP{0} Status|12 | 388 | 390181 | 2785 | 13 | 2785 | 5 | 12 | 2 | 64.4 | 2.0 |
| CHW Supply Temp | SP{0} Status|12 | 388 | 411341 | 2785 | 13 | 2785 | 5 | 12 | 2 | 64.4 | 2.0 |
| CHW Supply Temp | SP{0} Status|12 | 388 | 433011 | 2785 | 13 | 2785 | 5 | 12 | 2 | 64.4 | 2.0 |
| CHW Supply Temp | SP{0} Status|12 | 388 | 439199 | 2785 | 13 | 2785 | 5 | 12 | 2 | 64.4 | 2.0 |
| CHW Supply Temp | SP{0} Status|12 | 388 | 441946 | 2785 | 13 | 2785 | 5 | 12 | 2 | 64.4 | 2.0 |
| Voltage Phases AB | Voltage Sag A-B Alarm | 263 | 398250 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Voltage Phases BC | Voltage Sag B-C Alarm | 263 | 398251 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Voltage Phases CA | Voltage Sag C-A Alarm | 263 | 398252 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Frequency | Under Frequency Alarm | 263 | 398268 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Voltage Phases CA | Voltage Sag C-A Alarm | 263 | 430403 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Voltage Phases AB | Voltage Sag A-B Alarm | 263 | 430404 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Voltage Phases BC | Voltage Sag B-C Alarm | 263 | 430405 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| Frequency | Under Frequency Alarm | 263 | 430408 | 1893 | 14 | 1893 | 2 | 13 | 5 | 43.8 | 1.3 |
| 0x9d00001@SanderTunnel10_65_1_254.Sigma_Commons | Potential Power Loss | 3 | 230212 | 1831 | 15 | 1831 | 1 | 14 | 6 | 42.3 | 1.3 |
| Current C@SanderTunnel10_65_1_254.Sigma_Commons | Potential Power Loss | 3 | 442797 | 1189 | 16 | 1189 | 1 | 15 | 6 | 27.5 | 0.8 |
| Current A@SanderTunnel10_65_1_254.Sigma_Commons | Potential Power Loss | 3 | 442796 | 1178 | 17 | 1178 | 1 | 16 | 6 | 27.2 | 0.8 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 28 | 294162 | 982 | 18 | 982 | 2 | 17 | 5 | 22.7 | 0.7 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 28 | 430395 | 982 | 18 | 982 | 2 | 17 | 5 | 22.7 | 0.7 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 28 | 294161 | 980 | 19 | 980 | 2 | 18 | 5 | 22.6 | 0.7 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 28 | 430394 | 980 | 19 | 980 | 2 | 18 | 5 | 22.6 | 0.7 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 228 | 404643 | 536 | 20 | 536 | 1 | 19 | 6 | 12.4 | 0.3 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 222 | 407539 | 502 | 21 | 502 | 1 | 20 | 6 | 11.6 | 0.3 |
| Over THD Current A Alarm | Over THD Current A Alarm | 225 | 440001 | 453 | 22 | 453 | 1 | 21 | 6 | 10.4 | 0.3 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 192 | 402347 | 295 | 23 | 295 | 1 | 22 | 6 | 6.8 | 0.2 |
| Over THD Voltage A-B Alarm | Over THD Voltage A-B Alarm | 192 | 402348 | 295 | 23 | 295 | 1 | 22 | 6 | 6.8 | 0.2 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 192 | 402409 | 289 | 24 | 289 | 1 | 23 | 6 | 6.6 | 0.2 |
| Over THD Voltage C-A Alarm | Over THD Voltage C-A Alarm | 192 | 402413 | 288 | 25 | 288 | 1 | 24 | 6 | 6.6 | 0.2 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 192 | 402498 | 285 | 26 | 285 | 1 | 25 | 6 | 6.5 | 0.2 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 28 | 402474 | 283 | 27 | 283 | 1 | 26 | 6 | 6.5 | 0.2 |
| Over THD Voltage C-N Alarm | Over THD Voltage C-N Alarm | 192 | 402499 | 268 | 28 | 268 | 1 | 27 | 6 | 6.2 | 0.1 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 228 | 404641 | 248 | 29 | 248 | 1 | 28 | 6 | 5.7 | 0.1 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 228 | 404642 | 248 | 29 | 248 | 1 | 28 | 6 | 5.7 | 0.1 |
| Over THD Voltage A-N Alarm | Over THD Voltage A-N Alarm | 225 | 407517 | 213 | 30 | 213 | 1 | 29 | 6 | 4.9 | 0.1 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 225 | 407518 | 213 | 30 | 213 | 1 | 29 | 6 | 4.9 | 0.1 |
| Over THD Voltage B-N Alarm | Over THD Voltage B-N Alarm | 191 | 407237 | 211 | 31 | 211 | 1 | 30 | 6 | 4.8 | 0.1 |
| Over THD Voltage B-C Alarm | Over THD Voltage B-C Alarm | 191 | 407238 | 210 | 32 | 210 | 1 | 31 | 6 | 4.8 | 0.1 |
–>
IMPACTFULL / HIGH PRIORITY ALARMS ANALYSIS (qualitative analysis vs. quantitative analysis)
Quantitative proportion of High priority & potential impacting alarms
List of these alarms
Recommendation
Focus on Meter 3 (only 3 alarms)
Focus on Meter 388 (only 10 alarms)
ASSUMPTIONS & ISSUES
Absent month : No alarms => NA in Nr of alarms disactivate the report generation or use 0 as values ????
Other text and sections pushed into appendix : Any re-use
ISA 18.2 Chattering text
There are several alarms related standards.
By looking at the ISA18.2 standard, we can use the definition of “nuisance alarm” (3.1.63) as “alarms that annunciates excessively, unnecessarily, or does not return to normal after the operator action is taken. EXAMPLE: chattering alarm, fleeting alarm, or stale alarm”.
And when we further look at the definition of “Chattering and fleeting alarms” (16.4.6), we can see how this will improve the alarm management :
"- A chattering alarm repeatedly transitions between the active state and the not active state in a short period of time.
Fleeting alarms are similar short-duration alarms that do not immediately repeat.
In both cases, the transition is not due to the result of operator action."
what is the problem : These alarms may massively and more or less regularly hit your system, creating a very high noise level, which makes it hard for a user to know where to focus and what is really important to do first.
"- It is possible for a chattering alarm to generate hundreds or thousands of records in a few hours.
This results in a significant distraction for the operators.
Chattering alarms are often high in the listing of the most frequent alarms. Chattering and fleeting alarm behaviors should be eliminated.
There is no long-term acceptable quantity of chattering or fleeting alarms."